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English definition of “high-speed”

high-speed

adjective [before noun] uk   /ˌhaɪˈspiːd/ us  
describes something that moves or operates very quickly: a high-speed train/ferry a high-speed computer high-speed data transmissionFast and rapidShort in time
(Definition of high-speed from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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